Spring vehicle-wheel.



W. E. FAHRNBY.

SPRING VEHICLE WHEEL.

APPLIOATIUN FILED Mmm. 1914.

1,108,564, Patented Aug.25,1914.

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W. H. FAHRNEY.

SPRING VEHICLE WHEEL.

APPLICATION FILED Mmm, 1914.

1 l 08, 5 64 Patented Aug. 25, 191% Z SHEETS-SHEET 2.

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WILLIAM H. FAHRNEY, OF CHICAGO, ILLINOIS.

SPRING' VEHICLE-WHEEL.

Specicatien of Letters Patent.

Application filed March 9, 1914. Serial No. 823,440.

To ctZZ whom 'it may concern:

Be it known that I, WILLIAM H. FAHR- NEY, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofillinois, have invented a new and useful improvement in SpringVehicle-'Vheels, of which the following is a specification.

My invention relates particularly to an improved construction of thesprings used for connecting the wheel-center with the rim where thelatter is an annular' spring-band.

`ln the accompanying' drawing, Figure l shows a wheel embodying myimpro-vement by a view in side elevation, partly broken; and Fig. 2 isan enlarged section on line. 2, Fig. l.

The wheel-center shown is a hub 3 having a disk l formed integra-l withit and a companion-disk 5 fitting an offset near one end of the hub. Theband-spring G, shown to be formed of two concentric bands embedded in asolid tire 7 of rubber or other suitable material, carries at uniformintervals clips 8, each of the preferred construction illustrated inFig. 2, comprising a cross-plate 8f* and a socket-head 8b embracing thebandspring between them and rigidly fastened together by bolts crossingthe opposite edges of the annulus and about which and the crossplate andsocket-heads the material. of the tire 7 is shown to be molded. Thecenter and band-spring are connected at each clip by a spoke-likespring-device 9. This device comprises a headed stem 9 pivotally pinnedthrough the head in a sockethead 8b and provided between its ends with athreaded section 9b, the stem extending through the outer-end and sidemembers of an open rectangular metal frame 9C into a socket 9d in itslower member, which is piv` otally pinned between the disks le and 5; onthe ste1n-thread is a nut l0, between which and the inner end-member ofthe frame is confined a spiral spring ll, and a similar spring l2 isconfined in the frame be tween its outer-end member and a nut l0 on thestem-thread.

To construct the wheel, an annular springband is used having a degree ofrigidity that will cause it to resist iiexure under a given load. Thesprings 12 of the spokelike devices 9 are put by their nuts l0 under atension sufficient to support that load and exert a uniform centripetaltension on the annular spring to maintain its circular shape undernormal conditions. When, however, the 'wheel is subjected to strainbeyond the aforesaid given load, as in encountering a stone or otherobstruction in its path, the impact will flex the band G at the pointwhere it encounters the obstruction and overcome the resistance of thesprings 12 in the lower part of the wheel to permit resilient action ofthe annular band.

The springs 11 are put by the nuts l0 under a predetermined tensiongreater than that of the springs 12, and serve the purpose of causingthe wheel to respond resiliently in ease of an overload of given amount,such as results from the wheel entering a more or less deep rut. Theoverload is then taken by the springs l1 in compressing under its forcein resiliently flexing the annular' spring 6.

lVhat I claim as new and desire to secure by Letters Patent is l. Aspring vehicle-wheel having an annular band-spring, a wheel-center, and.springdeviees connecting the band-spring and wheel-center at intervalsand each comprising a frame pivotally connected at its inner end withsaid center, a stem pivotally connected with the band-spring, said stemworking lengthwise in the frame and` having a threaded section, nuts onsaid threaded section, a springl confined about the stem between ene nutand the outer end of the frame, and a spring confined about the steinbetween the other nut and the inner end of the frame.

Q. A spring vehicle-wheel having an annular band-spring, a wheel-center,and. spring-devices connecting the band-spring and wheehcenter atintervals and each comprising' a frame having a socket in its inner endat which it pivotally connected with said center, a stein piif'otallyconnected with the band-spring, said stein extending through the frameinto said socket and having a threaded section, nuts on said threadedsection, a spring confined about the stem between one nut and the outerend `of the frame, and a spring confined about the stem between theother nut and the inner end of the frame.

l/VILLIAM H. liiil-IRNEY.

In presence of- D. C. TI-Ionsnn, A. C. FISCHER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C."

Patented any. 25, 1914.

